* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(0,0,0,0.1);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }
        .logo {
            font-size: 2rem;
            font-weight: bold;
            color: #764ba2;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: #667eea;
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-mobile {
            display: none;
        }
        @media (max-width: 768px) {
            .nav-mobile {
                display: block;
            }
        }
        .nav-link {
            text-decoration: none;
            color: #333;
            font-weight: 500;
            transition: color 0.3s ease;
            padding: 0.5rem 1rem;
            border-radius: 5px;
        }
        .nav-link:hover {
            color: #764ba2;
            background: rgba(118, 75, 162, 0.1);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: #333;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .mobile-menu {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            background: white;
            box-shadow: 0 5px 20px rgba(0,0,0,0.1);
        }
        .mobile-menu.active {
            display: block;
        }
        .mobile-nav {
            display: flex;
            flex-direction: column;
            padding: 1rem;
        }
        .breadcrumb {
            background: rgba(255, 255, 255, 0.9);
            padding: 1rem 0;
            margin-top: 80px;
        }
        .breadcrumb-content {
            display: flex;
            gap: 0.5rem;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #764ba2;
            text-decoration: none;
        }
        main {
            background: white;
            margin: 2rem auto;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            overflow: hidden;
        }
        .article-header {
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: white;
            padding: 3rem 2rem;
            text-align: center;
        }
        .article-title {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        .article-meta {
            display: flex;
            justify-content: center;
            gap: 2rem;
            margin-top: 1rem;
            opacity: 0.9;
        }
        .article-content {
            padding: 3rem 2rem;
            max-width: 800px;
            margin: 0 auto;
        }
        .content-section {
            margin-bottom: 3rem;
        }
        h2 {
            color: #764ba2;
            margin: 2rem 0 1rem 0;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid #667eea;
            font-size: 1.8rem;
        }
        h3 {
            color: #667eea;
            margin: 1.5rem 0 1rem 0;
            font-size: 1.4rem;
        }
        p {
            margin-bottom: 1rem;
            text-align: justify;
            font-size: 1.1rem;
            line-height: 1.8;
        }
        .highlight {
            background: linear-gradient(135deg, #667eea20, #764ba220);
            padding: 2rem;
            border-radius: 10px;
            border-left: 4px solid #764ba2;
            margin: 2rem 0;
        }
        .code-list {
            background: #f8f9fa;
            border-radius: 10px;
            padding: 1.5rem;
            margin: 2rem 0;
        }
        .code-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem;
            background: white;
            margin: 0.5rem 0;
            border-radius: 5px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }
        .code {
            font-family: monospace;
            font-weight: bold;
            color: #764ba2;
        }
        .reward {
            color: #28a745;
            font-weight: bold;
        }
        .search-section {
            background: #f8f9fa;
            padding: 2rem;
            border-radius: 10px;
            margin: 2rem 0;
            text-align: center;
        }
        .search-form {
            display: flex;
            max-width: 500px;
            margin: 0 auto;
        }
        .search-input {
            flex: 1;
            padding: 1rem;
            border: 2px solid #667eea;
            border-radius: 5px 0 0 5px;
            font-size: 1rem;
        }
        .search-button {
            background: #764ba2;
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 0 5px 5px 0;
            cursor: pointer;
            transition: background 0.3s ease;
        }
        .search-button:hover {
            background: #667eea;
        }
        .rating-section {
            background: #fff3cd;
            padding: 2rem;
            border-radius: 10px;
            margin: 2rem 0;
            text-align: center;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star {
            font-size: 2rem;
            color: #ffc107;
            cursor: pointer;
            transition: transform 0.2s ease;
        }
        .star:hover {
            transform: scale(1.2);
        }
        .comment-section {
            margin: 3rem 0;
        }
        .comment-form {
            background: #f8f9fa;
            padding: 2rem;
            border-radius: 10px;
            margin-bottom: 2rem;
        }
        .form-group {
            margin-bottom: 1rem;
        }
        .form-input {
            width: 100%;
            padding: 1rem;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 1rem;
        }
        .form-textarea {
            min-height: 120px;
            resize: vertical;
        }
        .submit-button {
            background: #764ba2;
            color: white;
            padding: 1rem 2rem;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.3s ease;
        }
        .submit-button:hover {
            background: #667eea;
        }
        .article-image {
            width: 100%;
            max-width: 600px;
            height: auto;
            border-radius: 10px;
            margin: 2rem auto;
            display: block;
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
        }
        .footer-links {
            background: #2c3e50;
            color: white;
            padding: 3rem 0;
        }
        .web-links {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1rem;
            margin-bottom: 2rem;
        }
        .web-link {
            background: rgba(255,255,255,0.1);
            padding: 1rem;
            border-radius: 5px;
            transition: background 0.3s ease;
        }
        .web-link:hover {
            background: rgba(255,255,255,0.2);
        }
        .web-link a {
            color: #667eea;
            text-decoration: none;
        }
        footer {
            background: #1a252f;
            color: white;
            text-align: center;
            padding: 2rem 0;
        }
        .footer-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
        }
        @media (max-width: 768px) {
            .footer-content {
                flex-direction: column;
                text-align: center;
            }
        }
        .text-center {
            text-align: center;
        }
        .text-bold {
            font-weight: bold;
        }
        .text-accent {
            color: #764ba2;
        }
        .emoji {
            font-size: 1.2em;
            margin: 0 0.2rem;
        }
        @media (max-width: 768px) {
            .article-title {
                font-size: 2rem;
            }
            .article-content {
                padding: 2rem 1rem;
            }
            .header-content {
                padding: 0.5rem 0;
            }
            .breadcrumb {
                margin-top: 60px;
            }
        }
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .fade-in {
            animation: fadeIn 0.6s ease-out;
        }
        .interactive-card {
            background: white;
            border-radius: 10px;
            padding: 1.5rem;
            margin: 1rem 0;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            cursor: pointer;
        }
        .interactive-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
        }